CVE-2026-3847

HIGH 8.8

Memory safety bugs fixed in Firefox 148.0.2

CVSS Score

8.8

EPSS Score

0.0%

EPSS Percentile

0th

Memory safety bugs present in Firefox 148.0.2. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 148.0.2.

Vendor	mozilla
Product	firefox
Ecosystems	Browser JavaScript
Industries	Technology
Published	Mar 10, 2026
Last Updated	Apr 13, 2026

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Affected Versions

Mozilla / Firefox

All versions affected

References

NVD ↗ CVE.org ↗ EPSS Data ↗

bugzilla.mozilla.org: https://bugzilla.mozilla.org/buglist.cgi?bug_id=2017513%2C2017622%2C2019341 mozilla.org: https://www.mozilla.org/security/advisories/mfsa2026-19/

Credits

Jon Coppeard and the Mozilla Fuzzing Team